[don-o]

It's you're or you are dumbass.

I'm with you friend.

This simple distinction is easily the most common error on all internet boards.

You're = Contraction for "You are." As in, "You're talking nonsense, dope."

Your = Possesive pronoun, As in, "Remove your head from your arse"

[katnip]

Oops, you caught me cussin..